Analysis by: Paul Steven Nadera
 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Potentially Unwanted Application

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Canal de infecção: Downloaded from the Internet, Dropped by other malware

This Potentially Unwanted Application arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites. It may be manually installed by a user.

It connects to certain websites to send and receive information. It uses a user interface (UI).

  TECHNICAL DETAILS

Tipo de compactação: 3,872,256 bytes
Tipo de arquivo: EXE
Residente na memória: No
Data de recebimento das amostras iniciais: 14 Apr 2021
Carga útil: Displays graphics/image, Drops files, Connects to URLs/IPs

Arrival Details

This Potentially Unwanted Application arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It may be manually installed by a user.

Installation

This Potentially Unwanted Application drops the following files:

  • {Malware file location}\Error.txt

Other Details

This Potentially Unwanted Application connects to the following website to send and receive information:

  • http://a.{BLOCKED}0.com/

It uses the following user interface:



It does the following:

  • The sample provided has an expired trial period
  • Supports mass PDF file encryption, with the intent of protecting PDF documents.
  • Has the following capabilities:
    • The encrypted PDF document can be opened normally without installing Acrobat Reader.
    • It can prohibit the printing of pdf documents.
    • It can prohibit copying the text in the PDF document.
    • It can prohibit saving a copy.
    • It can prohibit screenshots.
    • It can add a custom watermark.
    • It can increase the picture LOGO when the PDF document is opened.
    • It can customize the website that opens when closing PDF document.
    • It can customize the reading expiration time of PDF documents.
    • It can customize the reading times of PDF documents.
    • It can customize the PDF document window mode (maximized or normal mode).

  SOLUTION

Mecanismo de varredura mínima: 9.800
SSAPI Pattern File: 2.399.00
SSAPI Pattern Release Date: 15 Apr 2021

Step 1

Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 users must disable System Restore to allow full scanning of their computers.

Step 2

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 3

Search and delete this file

[ Learn More ]
There may be some files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.

Step 4

Scan your computer with your Trend Micro product to delete files detected as PUA.MSIL.PDFCrypt.A. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check the following Trend Micro Support pages for more information:


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